Pregnancy Due Date Calculator
Estimate your baby's due date and key milestones in seconds
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Have you worked out your due date three different ways and got three different answers? Do you know the date but not what happens between now and then? The Pregnancy Due Date Calculator gives you an estimated date plus the milestones that come with it.
A date on its own is only the beginning. What most people want next is the shape of the months ahead.
Short answer: EizTools offers the Pregnancy Due Date Calculator at no charge, and it estimates your due date from your last period, conception date, IVF transfer or scan, then explains your current week, trimester and the milestones ahead.
What is Pregnancy Due Date Calculator?
It is a dating tool that also explains itself. You give the date it should count from and your usual cycle length, and the Pregnancy Due Date Calculator returns an estimated delivery date, how many weeks you are today, which trimester that falls in, and what typically happens next.
Who Uses It
- Anyone who has just found out and wants a rough date before the first appointment.
- People with irregular cycles, where the standard calculation is misleading.
- Couples after IVF, where the transfer date is the accurate starting point.
- Partners and family trying to plan leave around an estimate.
How Does Pregnancy Due Date Calculator Work?
Type the date and any detail you have into the prompt box, choose which AI engine works it out, then set the options and generate. The answer arrives in the card underneath, and can be copied or saved in Word, TXT or HTML.
Today's runs are kept in the panel below the result, which is useful if you want the estimate from your last period next to the one from a scan.
Four ways to calculate
Last period, conception date, IVF transfer or ultrasound, whichever information you have.
Where you are today
The week and trimester you are in now, not just the date at the end.
Milestones ahead
Typical scan and appointment points, so the months have some shape to them.
Getting An Accurate Estimate
| Option | What it decides | Choose |
|---|---|---|
| Calculation Method | Which date the maths starts from | Ultrasound date when you have had a scan |
| Cycle Length | Adjusts for cycles longer or shorter than average | Your real average, not 28 by default |
| Detail Focus | How much comes back with the date | Milestone timeline for a fuller picture |
| Date Format | How dates are written | Month DD, YYYY, which avoids confusion |
The toggles add a trimester summary, key prenatal milestone dates, an estimated conception window and a reminder to confirm everything with your doctor or midwife.
Important A due date from any calculator is an estimate. Your midwife or doctor will confirm dating with a scan, and most babies arrive in the two weeks either side. Always follow the dates your clinical team gives you.
Tips For A Clearer Answer
- Give the first day of your last period, not the last day.
- Say if your cycles run long or short, since a 35 day cycle shifts the estimate by a week.
- After IVF, state whether it was a day three or day five transfer.
- If you have had a dating scan, use that date and method instead.
EizTools is a free AI platform where every tool has its own purpose built workspace, no account is needed, and a model selector lets you choose the engine before you generate. Results can be copied, downloaded or read aloud. The wider free tool library covers planning, writing and everyday tasks.
Frequently Asked Questions
How accurate is a due date calculation?
It is a good estimate rather than a prediction. Only a small share of babies arrive on the exact date, and an early scan is the most reliable dating method.
What if my cycle is irregular?
Choose Irregular for cycle length and mention the range. Dating from a scan is far more reliable than dating from a period in that situation.
Can it work from an IVF transfer date?
Yes. Select IVF transfer date and say whether it was a day three or day five embryo, since that changes the calculation by two days.
Does it tell me what happens each week?
Turn on the trimester summary and the milestone dates. You get typical appointment and scan points, though your local schedule may differ.
Knowing roughly when helps you plan leave, appointments and everything else that suddenly needs organising. Take the estimate as a working date, and let your midwife confirm it at the first scan.
The calculator is above this article. Enter your date and cycle length, and see your estimated week.
Sabir Bepari
Founder of EizTools and a passionate AI enthusiast dedicated to building practical, user-friendly AI tools that simplify everyday tasks.
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